I just finished building a HV supply for two of my home built amplifiers..
I purchased an PeterDahl ARRL-02-002 transformer and designed a slow-start circuit around him.
First live tests where conducted yesterday with somewhat good resaults.. Using a variac everything is ok...
I'm working with a 230VAC circuit with a 16A breaker - and I know it is not enough for full utilization of the supply
The slowstart is pretty straight forward - using a timer circuit to close one relay to apply power to the transformer and a secondary delayed relay that shorts out a resistor that is otherwise in series with the mains supply to the transformer.
The mains here in Iceland is either PEN or 2 live phases with 220v between them.. basically just a single phase system.
I used two 47 ohm resistors on each "line" and the double throw relay shorts them both.
The timer is set to around 400ms give or take. - I have not done any adjustment of the timer - but bit long.
So when I give the HV the control signal I sometimes trigger the breaker - during the AC peak voltage period.
I would think I could soft start this transformer on a 16A breaker ? or what ?
does timing or the value of the soft-start greatly affect this ?
any suggestions before I kill the breaker with further testing ?
Also one other thing that I have not tested - and I don't intend to test this but mildly curious..
but I have a HV ceramic switch (Radioswitch 86) that I can use to switch between the secondary taps of the ARRL-002-02 transformer. I use WD7S HV-2 board as the rectifier. Is there any inherent danger involved hot-switching the taps ? I assume so - e.g. switching down from a higher voltage ?
73, Benni TF3CY